Table 2.
Postsynaptic targets of M2R+ axon terminals forming asymmetrical (AS) or symmetrical (S) synapses in the BLa. PUR and Ni-DAB data were similar and were pooled (406 synapses total). M2R-positive and M2R-negative structures are indicated with a plus sign (+) or a minus sign (−), respectively. Abbreviations: Pk, perikarya; LD, large-caliber dendrite (>1.0 μm wide); SD, small-caliber dendrite (<1.0 μm wide); Sp; spine.
| Synapse Type |
Pk+ | Pk−1 | LD+ | LD− | SD+ | SD− | Sp+ | Sp− | Total |
|---|---|---|---|---|---|---|---|---|---|
| AS | 0% | 0.3% 1/273 |
4.8%, (13/273) |
0% | 17.6%, (48/273) |
0% | 55.3%, (151/273) |
21.9%, (60/273) |
273 (100%) |
| S | 3.0% (4/133) |
25.6% (34/133) |
21.8% (29/133) |
0.7% (1/133) |
29.3%, (39/133) |
1.5% (2/133) |
10.4%, (14/133) |
7.5%, (10/133) |
133 (100%) |
1
The term “unlabeled perikarya” (Pk−) refers to perikarya with no M2R-ir, or M2R-ir only in the Golgi complex.